fix(start): enable Send Feedback / Release Notes on the start tab

The start (welcome) tab blocks any command that isn't NEW/OPEN/EXIT/QUIT,
so the Contribute and Release Notes buttons did nothing but print
"No drawing open". REPORT and CHANGELOG (and ABOUT) only open a URL or a
dialog and need no drawing, so allow them through.

Also rename the "Contribute" button to "Send Feedback" (#44) and update
the REPORT status line to match.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/app/commands.rs

@@ -32,7 +32,12 @@ impl OpenCADStudio {
         // command would silently do nothing. Allow only the commands that
         // make sense there (create / open a document, or quit) and tell the
         // user otherwise instead of running a no-op. See #96.
-        if self.tabs[i].is_start && !matches!(cmd, "NEW" | "OPEN" | "EXIT" | "QUIT") {
+        if self.tabs[i].is_start
+            && !matches!(
+                cmd,
+                "NEW" | "OPEN" | "EXIT" | "QUIT" | "REPORT" | "CHANGELOG" | "ABOUT"
+            )
+        {
             self.command_line
                 .push_info("No drawing open. Use NEW or OPEN to start a drawing.");
             return Task::none();
@@ -2663,7 +2668,7 @@ impl OpenCADStudio {
 
             "REPORT" => {
                 let _ = open::that("https://github.com/HakanSeven12/OpenCADStudio/issues/new");
-                self.command_line.push_info("Opening GitHub issue page...");
+                self.command_line.push_info("Opening feedback page...");
             }
 
             "ABOUT" => {

src/app/view.rs

@@ -3730,7 +3730,7 @@ pub(super) fn start_page_view<'a>() -> Element<'a, Message> {
 
     let secondary_row = row![
         outline_btn(
-            "Contribute",
+            "Send Feedback",
             Message::RibbonToolClick {
                 tool_id: "REPORT".to_string(),
                 event: crate::modules::ModuleEvent::Command("REPORT".to_string()),